down quark

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down quark

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down quark (plural down quarks)

1. (physics) A quark having a fractional electric charge of ${\displaystyle -{\frac {1}{3}}}$ and a mass of about 4 to 8 MeV.
   Symbol: ${\displaystyle d}$

• (quarks) quark; up quark, down quark, charm quark, strange quark, top quark/truth quark, bottom quark/beauty quark ^{(Category: en:Quarks)}